Advice For Soloing In Everfrost

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The one nice thing I like about playing a Necro is I feel comfortable enough with soloing for XP/Platinum without worrying about grouping. Last few levels I've been soloing Spectres and hit level 49 and feel like heading out to Everfrost to solo some Barbarian Guards such as Bandl McMarrin and Ice Giants.

My question is what sort of spell setup should I go with when face these mobs? Would it be best to go in with Cascading Darkness - Invoke Fear - Asystole - Ignite Blood or Cascading Darkness - Paralyzing Earth - Asystole - Ignite Blood?

By the way, how many dots can Necros stack?